Explanation:
Hydrogen peroxide (H2O2) when decomposes forms water and oxygen in a reaction as shown below
[tex]H_2O_2 \rightarrow H_2O + O_2[/tex]
However, this reaction is not completely balanced as number of oxygen atoms on reactant and product sides are not same
So, the complete balance equation looks like
[tex]2H_2O_2 \rightarrow 2H_2O + O_2[/tex]